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anonymous

  • one year ago

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  1. anonymous
    • one year ago
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    I was able to figure out how to graph the \[f(x)=\sqrt{3x+2}\]

  2. anonymous
    • one year ago
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    but the f^-1 is new to me

  3. welshfella
    • one year ago
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    ok you need to find x in terms of f(x) let f(x) = y y = sqrt(3x + 2) square borh sides y^2 = 3x + 2 can you continue?

  4. anonymous
    • one year ago
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    now , from what @welshfella did, try making x the subject formula

  5. anonymous
    • one year ago
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    I feel so dumb right now, but I'm really trying to understand.

  6. welshfella
    • one year ago
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    f-1(x) means the inverse of f(x) find x in terms of y:- 3x = y^2 - 2 x = (y^2 - 2) / 3 now replace x by f-1(x) and y by x f-1(x) = (x^2 - 2) / 3

  7. anonymous
    • one year ago
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    very correct @welshfella

  8. anonymous
    • one year ago
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    okay before I saw the answer at the bottom there I made up my mind that it had to be the third option I have in the picture, which I guess means I do understand it a little bit.

  9. anonymous
    • one year ago
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    Thanks so much @welshfella I'll have to keep reviewing this though

  10. welshfella
    • one year ago
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    yes and try a few examples try a simple one ;- f(x) = 4x Find f-1(x)

  11. welshfella
    • one year ago
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    |dw:1440070102055:dw|

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spraguer (Moderator)
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